20854648169653 has 8 divisors (see below), whose sum is σ = 21039500484288. Its totient is φ = 20669801081664.

The previous prime is 20854648169647. The next prime is 20854648169671. The reversal of 20854648169653 is 35696184645802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20854648169653 is a prime.

It is a super-2 number, since 2×20854648169653² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20854648167653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6938376 + ... + 9478942.

It is an arithmetic number, because the mean of its divisors is an integer number (2629937560536).

Almost surely, 2^{20854648169653} is an apocalyptic number.

It is an amenable number.

20854648169653 is a deficient number, since it is larger than the sum of its proper divisors (184852314635).

20854648169653 is a wasteful number, since it uses less digits than its factorization.

20854648169653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613323.

The product of its (nonzero) digits is 298598400, while the sum is 67.

The spelling of 20854648169653 in words is "twenty trillion, eight hundred fifty-four billion, six hundred forty-eight million, one hundred sixty-nine thousand, six hundred fifty-three".